/Engine/Plugins/Media/ElectraCDM/Source/ElectraCDM/Public/ElectraCDMClient.h
Registers an application event listener to receive OnCDMEvent() messages.
void RegisterEventListener ( [TWeakPtr](API\Runtime\Core\Templates\TWeakPtr)< [IMediaCDMEventListener](API\Plugins\ElectraCDM\IMediaCDMEventListener), ESPMode::ThreadSafe > InEventListener )